Word Origin & History

triangle late 14c., from O.Fr. triangle (13c.), from L. triangulum "triangle," from neut. of adj. triangulus "three-cornered," from tri- "three" + angulus "corner, angle." Triangulation is recorded from 1818."In the huts of witches all the instruments and implements are triangular." ["Handwörterbuch des deutschen Aberglaubens"]

Example Sentences for triangle

Two of the three great fortresses forming the Polish triangle had now gone; Brest alone remained, and its doom was already sealed.

Imagine that before the flood this triangle was thickly covered with houses.

What a triangle of strongholds—Cyprus, Malta, and Gibraltar!

They had come to the triangle, the place where the sloping walks meet at an angle.

A triangle of brightest crimson, sharply defined, issues from the handsome orange throat.

The basis is indeed the invariable and unsatisfactory "triangle."

The men sat up with guns for him—no; a keeper set traps in a triangle for him—no.

The summit or vertex of anything; as the upper point of a triangle.

And that indeed is the least: For even a triangle it selfe, may be cut into as many triangles as one please.

This is nothing else but an interpretation of the Greeke word; So a triangle of 16.